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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2014-10-06 17:53:53 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2014-10-09 09:14:13 +0200
commit8070361799ae1e3f4ef347bd10f0a508ac10acfb (patch)
tree9846c0633cd28a86dc62eca55a4268fed513fcfd /arch/s390/kernel/smp.c
parent42f4dd613fe808676126472bbe1283e452201148 (diff)
downloadlinux-linaro-stable-8070361799ae1e3f4ef347bd10f0a508ac10acfb.tar.gz
s390: add support for vector extension
The vector extension introduces 32 128-bit vector registers and a set of instruction to operate on the vector registers. The kernel can control the use of vector registers for the problem state program with a bit in control register 0. Once enabled for a process the kernel needs to retain the content of the vector registers on context switch. The signal frame is extended to include the vector registers. Two new register sets NT_S390_VXRS_LOW and NT_S390_VXRS_HIGH are added to the regset interface for the debugger and core dumps. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/smp.c')
-rw-r--r--arch/s390/kernel/smp.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index bba0e2469254..13cae5b152d7 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -179,6 +179,9 @@ static int pcpu_alloc_lowcore(struct pcpu *pcpu, int cpu)
goto out;
}
#else
+ if (MACHINE_HAS_VX)
+ lc->vector_save_area_addr =
+ (unsigned long) &lc->vector_save_area;
if (vdso_alloc_per_cpu(lc))
goto out;
#endif